Data from: Reinstatement of the Southern Andean genus Stenodraba (Brassicaceae) based on molecular data and insights from its environmental and geographic distribution

Stenodraba (Brassicaceae) included a group of eight species distributed
along the Andes of South-Central Argentina and Chile. All of its species
were subsequently transferred to other genera and are currently treated in
Pennellia (Tribe Halimolobeae) and Weberbauera (Tribe Thelypodieae).
However, the phylogeny of Stenodraba and its tribal placement were never
analyzed using molecular data. The lack of such studies, as well as
paucity of herbarium collections suggesting that some species are
vulnerable and/or endangered, prompted us to address the molecular
phylogeny of Stenodraba. For this purpose, we generated comprehensive
molecular phylogenies using nuclear (ITS) and plastid (trnL-F and
trnH-psbA) data, and conducted different niche comparisons in the
environmental and geographic space using climate data processed both by
ordination and species distribution modelling (SDM) techniques. The
results demonstrated that Stenodraba belongs to the South American tribe
Eudemeae and is related to the genera Aschersoniodoxa, Brayopsis,
Dactylocardamum, and Eudema. Stenodraba species formed two, strongly
supported clades, and although molecular data did not recover monophyly of
the genus, this hypothesis was not significantly rejected. The main clades
were differentiated in their climatic niches (both in the environmental
and geographical spaces), and niche overlap was greater within than
between clades. Systematic implications, including a key distinguishing
Stenodraba from the remaining genera of Eudemeae and a synopsis of its
species, are also provided.